The Stillinger-Weber potential [1]} models two- and three-body interactions by taking into account not only the distances between atoms but also the bond angles:
\(V_\text{SW}(r) = \sum _{\langle i, j \rangle } \phi _2(r_{ij}) + \sum _{\langle i, j, k \rangle } \phi _3(r_{ij}, r_{ik}, \theta _{ijk})\) 
